Re: Building my first amplifier. Where to start?
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It seems that the GU-81M is what you want. I just built an amplifier using a pair of FU-81/FM-8 (GU-81M/GI-8) with output power: 1.8-14MHz, 2900W, 21-28Mhz, 2500W.grid driven, if you only want 1KW, you can use one GU-81M on grunded-grid with a power gain of about The GU-81M has a large output capacitance, the plate capacitor must be replaced with a fixed capacitor and requires a roller inductor to tune, and at 21MHz and higher, the plate capacitor C1 is replaced by the output capacitor, as the EX8A does.?The amplifier is very quiet and requires little to no heating time, and the tubes are very inexpensive ? ? ? ?Hsu desmond auld GI0UTE < desauld@...> 于2023年12月27日周三 16:32写道：
Peter,
You are of course correct. But due to the tappings I have options to get the voltage to where I want. The rectifier and the DC produced would be better if I settled on 3 phase, but I prefer this to be a plan b at this stage.
Thanks des?
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